Merge pull request #4452 from shuujii/move-Kernel-equal-to-BasicObject

Move `Kernel#equal? to `BasicObject`

src/class.c

@@ -2154,6 +2154,7 @@ mrb_init_class(mrb_state *mrb)
   mrb_define_method(mrb, bob, "!=",                      mrb_obj_not_equal_m,      MRB_ARGS_REQ(1));
   mrb_define_method(mrb, bob, "__id__",                  mrb_obj_id_m,             MRB_ARGS_NONE()); /* 15.3.1.3.4  */
   mrb_define_method(mrb, bob, "__send__",                mrb_f_send,               MRB_ARGS_ANY());  /* 15.3.1.3.5  */
+  mrb_define_method(mrb, bob, "equal?",                  mrb_obj_equal_m,          MRB_ARGS_REQ(1)); /* 15.3.1.3.11 */
   mrb_define_method(mrb, bob, "instance_eval",           mrb_obj_instance_eval,    MRB_ARGS_ANY());  /* 15.3.1.3.18 */
 
   mrb_define_class_method(mrb, cls, "new",               mrb_class_new_class,      MRB_ARGS_OPT(1));

src/kernel.c

@@ -780,7 +780,6 @@ mrb_init_kernel(mrb_state *mrb)
   mrb_define_method(mrb, krn, "clone",                      mrb_obj_clone,                   MRB_ARGS_NONE());    /* 15.3.1.3.8  */
   mrb_define_method(mrb, krn, "dup",                        mrb_obj_dup,                     MRB_ARGS_NONE());    /* 15.3.1.3.9  */
   mrb_define_method(mrb, krn, "eql?",                       mrb_obj_equal_m,                 MRB_ARGS_REQ(1));    /* 15.3.1.3.10 */
-  mrb_define_method(mrb, krn, "equal?",                     mrb_obj_equal_m,                 MRB_ARGS_REQ(1));    /* 15.3.1.3.11 */
   mrb_define_method(mrb, krn, "extend",                     mrb_obj_extend_m,                MRB_ARGS_ANY());     /* 15.3.1.3.13 */
   mrb_define_method(mrb, krn, "freeze",                     mrb_obj_freeze,                  MRB_ARGS_NONE());
   mrb_define_method(mrb, krn, "frozen?",                    mrb_obj_frozen,                  MRB_ARGS_NONE());